Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quando os Cleveland Browns de 1966 jogaram contra o Green Bay Packers?
 ###Tabelas: CREATE TABLE manitoba_-_14_seats (manitoba_-_14_seats_id AUTO_INCREMENT PRIMARY KEY, Riding VARCHAR, Candidate VARCHAR, Gender VARCHAR, Residence VARCHAR, Occupation VARCHAR, Votes INT, Rank VARCHAR) CREATE TABLE top-performing_clubs_in_the_prime_league (top-performing_clubs_in_the_prime_league_id AUTO_INCREMENT PRIMARY KEY, Club VARCHAR, Champions INT, Runners-up INT, 3rd-Place INT, 4th-Place INT) CREATE TABLE regular_season_schedule (regular_season_schedule_id AUTO_INCREMENT PRIMARY KEY, Week INT, Date VARCHAR, Opponent VARCHAR, Result VARCHAR, Attendance VARCHAR) CREATE TABLE -_7_seats (-_7_seats_id AUTO_INCREMENT PRIMARY KEY, Riding VARCHAR, Candidate's Name VARCHAR, Gender VARCHAR, Residence VARCHAR, Occupation VARCHAR, Votes INT, Rank VARCHAR) CREATE TABLE current_codes (current_codes_id AUTO_INCREMENT PRIMARY KEY, Code VARCHAR, Subdivision name ( be ) (BGN/PCGN) VARCHAR, Subdivision name ( be ) (GOST) VARCHAR, Subdivision name ( ru ) (BGN/PCGN) VARCHAR, Subdivision name ( ru ) (GOST) VARCHAR, Subdivision category VARCHAR)  
SELECT Date FROM regular_season_schedule WHERE Opponent = green bay packers